#include <bits/stdc++.h>
using namespace std;

int a[1005];
int mxn[1005];
int main()
{
	int n,s = 0,maxn = INT_MIN,maxl;
	cin >> n;
	for(int i = 1;i <= n;i++)
		cin >> a[i];
	for(int i = 1;i <= n;i++)
	{
		for(int i = 1;i <= n;i++)
		{
			if(a[i] > maxn)
			{		
				maxn = a[i];
				maxl = i;
			} 	
		}
		mxn[i] = maxn;
		maxn = INT_MIN;
		a[maxl] = 0;
		maxl = 0;
	}
	for(int i = 1;i <= n;i++)
	{
		s += mxn[i];
		for(int i = 1;i <= n;i++)
		{
			mxn[i] = sqrt(mxn[i]);
		}
	}
	cout << s << endl;
	return 0;
}